影响猪断奶窝重的主要性状  

Effect of Main Traits on Weaning Weight of Litter in Pigs

作　　者：曹果清[1,2,3,4] 刘文忠[1,2,3,4] 周忠孝[1,2,3,4] 贾玉枝 武艳萍 王燕[1,2,3,4] 

机构地区：[1]山西农业大学动科系 [2]大同市种猪场 [3]山西省农业厅 [4]太原市动物繁殖站

出　　处：《山西农业大学学报》1998年第2期133-135,共3页

摘　　要：本文利用通径分析原理研究了ＳＤ—Ⅱ系猪的产仔数、产活仔数、初生个体均重、初生窝重、２０日龄窝重、断奶个体均重、断奶头数对３５日龄断奶窝重的影响。结果表明，断奶头数及其与其它性状的互作效应对断奶窝重的影响最大，其次为断奶个体均重。产仔数和２０日龄窝重对３５日龄断奶窝重的直接作用和决定程度较小，但间接作用很大，也是影响断奶窝重的主要性状；产活仔数、初生窝重、初生个体均重对３５日龄断奶窝重的直接作用、间接作用以及决定程度都很小，对断奶窝重的影响不大。Path analysis was used to study the effects of litter size,survival litter size,average body weight and litter weight at birth,litter weight at 20 days of age,average body weight and litter size at weaning (35 days of age) on weaning weight of litter in SD-Ⅱ strain pigs. The results showed that the litter size at weaning was the most important factor affecting the litter weight at weaning and the average body weight at weaning was the second.The litter size and litter weight at 20 days of age had less direct effects and decision on the litter weight at weaning,but had more indirect effects on it.They were also the main traits.The survial litter size,the litter weight and the average body weight at birth had less direct,indirect and decisive effects on the weaning litter weight at 35 days of age.They were not the main traits.

关 键 词：SD-Ⅱ系 猪 35日龄断奶窝重 通径分析 

分 类 号：S828.45[农业科学—畜牧学]